Gripboost is a self-starting wrist strength ball with a metal ball core and a plastic material. The product is described as a silent grip strength ball and wrist strength trainer.
The ball is self-starting, and its core is made of metal. The description identifies plastic as its material and describes the grip-strength ball as silent.
Why it works
The self-starting mechanism is a specific operating feature of this wrist strength ball.
A metal ball core is identified as part of its construction.
The grip strength ball is described as silent.
Specifications
Product type: Wrist strength ball
Operation: Self-starting
Material: Plastic
Ball core: Metal
Common questions
How does this wrist strength ball start? It is described as self-starting.
What is the ball core made of? The ball core is made of metal; the product material is identified as plastic.
Is this grip strength ball described as silent? Yes. It is described as a silent grip strength ball.
